William g



W. e; BULKLEY.

` FASTENERS Fon THE MEETING-RAILS oF sAsHE-s. No 184 501 Patented Nov.z1,1a7ve.

, ff' j @ggz j??? fzefses UNITED l IM PROVE M E NT l N .-FASTE-NE RES R @'IHIE :IVLEfEiL'l'slNGI1RALLSeO-F.SrSllES- Specification forming part-of 7Letters Patent No."184,"50 l ,.'datedfNovemberQll876 ;,app1ication ,led

April 17, 1876.

T o all whom it may concern:

Be it known thatvL WILIAM G. BULK--` LEY, of Jersey'Oity, in the countyof Hudson and the State of New Jerseyfhave invented an Improvement in -VVindow-Locks;y

ing, which forms a part of the specification.

My invention consists in a novel construction of a window-lock, whereby it cann'ot be unlocked from the outside of the'window, and whereby it cannot be unlocked from the inside without a key, the lock being composed of a spring-bolt socket-plate carrying a spring-bolt of peculiar form, and a catch-plate, also of peculiarconstruction, which is engaged by the said spring-bolt when the window is locked, the key being required both to lock and unlock the same.

Figure lis a cross-section through the meeting-rails of the. upper and lower sashes of a window, and alongitudinal section through the plates of the lock. Fig. 2 is a top view of the lock. Fig. 3 is a view of that end of the spring-bolt socket-plate which meets the catchplate when the plates come together, and Fig. 4 is a View of that end of the catch-,plate which meets the spring-bolt socket-plate.

-R and R' represent, respectively, the meeting-rails of the lower and upper sashes. To the rail R of the lower sash is attached the spring-bolt socket-plate A, with its attachments. To the rail R' of the upper sash is attached the catch-plateB. The plates A and B are attached to the rails of the sashes by screws C C', which are firmly attachedto said plates, preferably by placing said screws in the molds in casting the plates, and pouring the melted metal around the heads of said screws, according to a well-known method of attaching screws to plates of brass and other metals; or the said screws may be attached to the said screwplates inY any other way. The said screws are gimlet-pointed, and are screwed into the sash-rails by turning the plates. Small screws or nails n a are subsequently inserted through countersunk holes in said plates into the sash -rails to hold the plates from turning, and screwing outv the screws O C'. In the spring-bolt socket-plate Ais `forn'le'dasocket,--. s, Iinawhieh'fthe :springfbolt-fb-works. A--coiled-springmwhichgabuts against L:the shoulder @p in z-the'-.=:socketfs,:.and against t the-shoulder-rfon the ygsprin g.- bolt 11, itends fconstantly to :fthrust @the .,:said vv:spring- "boltfE awayfffromfthefcatch-@plate SB, but., aibush, d, which screws into the end of the socket s, prevents the coiled spring m from pushing 'the said spring-bolt out of the said socket. The spring-bolt b is, moreover, 'provided witha head, k, of angular or other f orm, which will prevent the key K, when fitted and applied to said head, from turning without also turning the said spring-bolt. The said spring-bolt turns -freely in the socket s when not engaged with the catch-plate B, and when` the bit c on the end of said bolt is pushed out of the socket, as hereinafter described. Another shoulder, '5, on the spring-bolt b, abuts against the shoulder pof the socket s when the said spring-bolt is pressed toward the catch-plate, and thus prevents the end of said spring-bolt from entering so far into the catch-plate as to interfere with its free working, and also to prevent rattling of the sashes.

On the end of the spring-bolt the socket s nearest the catch-plate B is a keyhole-shaped opening, a', through which the end of the spring-bolt upon which the said key-bit is formed passes when pressed forward. A similar opening, a, in the catchplate B, admits the end of the spring-bolt into the chamber fin the interior of said catchplate, the position of the said springbolt, when so passed into said catch plate and locked therein, being shown in dotted outline in Fig. 1. rllhe front wall w of the chamber f is preferably made with its inner surface inclined backward, so that when the spring-bolt turns on its longitudinal axis the bit e of the said spring-bolt will draw the boltv a little way into the said catch-plate. In the upper part of the said inclined wall w is formed a notch, o, corresponding in shape to the shape of the bit c, which the said bit e engages when the bolt is turned to bring the said bit over said notch o, the spring m throwing the bolt backward-sufficiently to force the said bit c into the said notch o. The bolt b is of a length sufcient to bring its end,with the bit c formed bv is formed a bit, e, resembling a key-bit, and in that end of `ing applied to the `head k of the bolt b, is pressed toward and through the opening a iu A' the catchplate B till the bit e enters the chamber fin said catch-plate. The keyis-then turned, which causes the bit e 011 the bolt b to turn and slide over the inclined inner surface of the Wall fw till it is brought over the notchl o, when i the spring m throws the bolt backward, and

causes the said bit e to engage the said notch o. In unlocking the bolt, the key is pressed toward the catch-plate till the shoulder i on the lock abuts `against the shoulder p Vof the socket. This releasesl the bit e from its erigagement with the notch o. The key is then slightly turned, and the pressure thereon removech-A The continued turning of the key brings the bite opposite that part of the opening a in the catch-plate which corresponds in shape with theshape of said bit, when the spring suddenly withdraws the bolt and completes the unlocking. l

I claim- The combination of' the spring-boltlb, having the bit e, and key-headk, adapted to be" operated both in locking and unlocking the lock by means of a detachable key, K, with the spring-bolt socket-plate A, and thecatch B, substantially as described.

y y l WM. Gr. BULKLEY.

Witnesses:

, BENJAMIN W. HOFFMAN,

FRED. HAYNES. 

